[rescue] Sun serial cable pinout question (null modem)

[Greg A. Woods]

[ On Thursday, August 15, 2002 at 12:26:20 (+1200), Gavin Hubbard wrote: ]
> Subject: [rescue] Sun serial cable pinout question (null modem)
>
> Hi Guys
> 
> I'm going to make up some null modem cables for my new Sun systems (using
> DB9/25-RJ45 shells).
> 
> The two pin-outs that I've seen for the Ultra 2 are:
> 
> 2-3
> 3-2
> 7-7
> 
> and
> 
> 2-3
> 3-2
> 7-20
> 20-7
> 
> Are these two equivalent?

Not quite.

The second looks wrong.  Normally pin-20 is DTR and pin 7 is signal
ground.  The two ports should always have their signal grounds tied
together.

> And for the 2nd setup, what do you do if one end
> is a DB9?

Just to be pedantic for a change, it's "DE-9".  :-)

"D" is the basic shape of the shell
"E" is the overall size of the shell (I think)
"9" is the nubmer of pins in the shell

for example:

  DA-15  --  15-pin
  DB-25  --  25-pin
  DC-37  --  37-pin
  DD-50  --  50-pin
  DE-9   --   9-pin


-- 
								Greg A. Woods

+1 416 218-0098;            <g.a.woods at ieee.org>;           <woods at robohack.ca>
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